Sperry Sun Well Surveying Co
Sperry SunActive Patents
0
Total Holdings
15
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2755067A | Method and apparatus for insulating a drill stem in continu… | Expired / Lapsed | 1951-01-02 | 1956-07-17 | 2 | Details |
| US2401371A | Electrical prospecting method and apparatus | Expired / Lapsed | 1935-05-02 | 1946-06-04 | 0 | Details |
| US2398800A | Electrical prospecting method and apparatus | Expired / Lapsed | 1940-07-06 | 1946-04-23 | 0 | Details |
| US2350371A | Borehole logging apparatus | Expired / Lapsed | 1940-07-23 | 1944-06-06 | 0 | Details |
| US2339274A | Electrical connecting means for well bore apparatus | Expired / Lapsed | 1939-08-10 | 1944-01-18 | 0 | Details |
| US2300709A | Electrical prospecting method | Expired / Lapsed | 1941-01-10 | 1942-11-03 | 0 | Details |
| US2271951A | Electrical prospecting method and apparatus | Expired / Lapsed | 1936-02-12 | 1942-02-03 | 0 | Details |
| US2246460A | Electrical prospecting apparatus | Expired / Lapsed | 1938-08-02 | 1941-06-17 | 0 | Details |
| US2230502A | Electrical prospecting method and apparatus | Expired / Lapsed | 1938-08-02 | 1941-02-04 | 0 | Details |
| US2222136A | Electrical prospecting method and apparatus | Expired / Lapsed | 1938-08-02 | 1940-11-19 | 0 | Details |
| US2211158A | Method for orienting cores | Expired / Lapsed | 1938-09-13 | 1940-08-13 | 0 | Details |
| US2197493A | Electrical prospecting apparatus | Expired / Lapsed | 1939-04-11 | 1940-04-16 | 0 | Details |
| US2167630A | Electrical prospecting method and apparatus | Expired / Lapsed | 1936-04-02 | 1939-08-01 | 0 | Details |
| US2149717A | Method and apparatus for calibrating magnetometers | Expired / Lapsed | 1938-03-15 | 1939-03-07 | 0 | Details |
| US1999215A | Well surveying device | Expired / Lapsed | 1929-04-30 | 1935-04-30 | 0 | Details |